The Stephen Quiller line of professional watercolor paint is imported by Jack Richeson & Company and is made by a European company that has been making paint since the 1860s.

The pigment is slowly ground on stone mills, thoroughly crushed and then coated in gum Arabic and honey. Pigments are pure with no additives and the colors are made to correspond with the Stephen Quiller color system. The mineral colors have an incredible granulation, which can be a definite advantage for artists, particularly to those for whom texture is important. The color is pure and extremely lightfast.